Closure means for rubber hot-water bottles or bags



Get 25, 1949. D. ATKIN CLOSURE MEANS FOR RUBBER HOT WATER BOTTLES ORBAGS Filed March 21, 1946 Patented Oct. 25, 1949 CLOSURE MEANS FORRUBBER HOT-WATER BOJITLES OR BAGS David Atkin, London, EnglandApplication March 21, 1946, Serial No. 656,108 In Great Britain December21, 1945 2 Claims. 1

This invention relates to bottles and particularly hot water bottles orbags and especially such as are formed of rubber, and has for its objectto provide a bottle or bag having an improved form of closure.

According to the invention within. the neck or equivalent portion of thebottle or bag there is provided for the engagement of the stopper are-entrant tubular element formed of an elastic material such as rubberleaving about it a recess into which the contents of the bottle mayenter, the lower or inner end of the reentrant tubular element beingfurnished with a shoulder against which a correspondingly formedshoulder located towards the lower end of the stopper will engage andleaving an aperture through which a spigot portion provided on thestopper will extend.

Conveniently, this re-entrant tubular element is provided towards itsupper or outer extremity with an internal shoulder or rib adapted to beengaged in a correspondingly formed groove in the stopper.

' Thus, preferably in accordance with the invention, the stoppercomprises an outer end portion adapted to facilitate its manipulation,that is to say its introduction into and withdrawal from the fillingaperture of the bottle, a flange to seat on the outer end of there-entrant tubular element, a groove below the flange into which the ribprovided on the outer end of the tubular element will engage, a parallelor somewhat tapered portion extending from the lower extremity of thisgroove and preferabl of a slightly greater length than the correspondingportion of the tubular element, a spigot portion on the lower end of thestopper which may be tapered to pass through the aperture surrounded bythe rib on the lower end of the tubular element, the inner peripheralsurface of the rib and the peripheral surface of the spigot portionbeing also conveniently tapered.

To facilitate the entry or centralising of the stopper with respect tothe filling aperture in inserting it'in the tubular element, theextremity of the stopper may be tapered or rounded and in the lattercase formed to provide a substantially hemi-spherical portion.

In the case of a hot water bottle formed of rubber or the like, thetubular element ma be cemented in position in the neck portion of thebottle but preferably it Will be formed in the moulding operation towhich the rubber mix is subjected in forming the bottle.

Further, the neck of the bottle may be formed to provide towards itsouter end a funnel to facilitate filling.

The construction of the neck of a hot water bottle or like flexiblecontainer for liquid, in accordance with the invention, will operate toprevent or give rise to difliculty in extracting as is usual the coremember through the neck or filling aperture.

Conveniently, or preferably, therefore, in accordance with theinvention, the body of the bottle is formed to enable the core to beextracted through the end thereof remote from the filling aperture, theopening left for the extraction of the core being subsequently closedas, for instance, by the insertion of a layer or sheet of a vulcanizablerubber mix between the adjacent surfaces of the end of the bottlethrough which the core is withdrawn and then vulcaniz- 8.

The invention will be described further in detail and by way of examplewith reference to the accompanying drawings in which:

Figure 1 is a view partly in section of a neck portion of a rubber hotwater bottle in accordance with the invention;

Figure 2 is a view in elevation of a construction modified in respect tothe association of the stopper with the body of the bottle.

In the construction illustrated, l is the body of the bottle, 2 the neckportion which, as usual, is formed to provide toward its outer end afunnel 3 adapted to facilitate filling the bottle, this portion beingprovided with a tab 4 in the case of the construction illustrated inFigure 1, furnished with a hole 5 by which the bottle may be suspended.

In the ease of the construction illustrated in Figure 2 a tab 6 isprovided to which the stopper is secured, the stopper being formedintegral with the tab and the neck and body of the bottle in this case.

In the case of the construction shown in Fig ure 1 the stopper is formedas an independent element but is otherwise of a form corresponding withthe form of the stopper shown in Figure 2.

Within the neck portion of the bottle there is provided a re-entranttubular element 1, formed of rubber, leaving a recess 8 between it andthe Wall 9 of the neck, and on the inner face of the re-entrant tubularelement there is provided towards its upper or outer extremity aninternal shoulder or rib Ill and at its lower or inner end a shoulder orrib I i.

The internal shoulder or rib I is designed to engage in a groove l2formed in the stopper below the end portion l3 of which, provided tofacilitate its manipulation, extends a generally cylindrical portion [4terminating in a spigot portion I5 and providing a shoulder [6 the faceof which will engage against the correspondingly formed face of theshoulder or rib I l, which is formed to leave an aperture through whichthe spigot portion l5 will extend.

One face of the groove [2 in the stopper is shaped to constitute aflange adapted to seat upon the base I! of the neck in the vicinity ofthe outer end of the re-entrant tubular element.

The portion l4 may, if desired, be somewhat tapered and will in any caseextend from the lower extremity of the groove l2 and terminate at adistance therefrom which may be somewhat greater than the length of thecorresponding portion of the tubular element, while the spigot portionon the lower end of the stopper is as shown somewhat tapered and isfurnished at its extremity with a rounded end l8.

In conclusion it may be pointed out that not only does the constructionof the neck of the bottle formed of relatively flexible material such asrubber in accordance with the invention provide a simple means forengaging the stopper in position in the bottle and for securing anefiective liquid tight joint between the stopper and the neck of thebottle, but it enables the bottle to be formed wholly of such flexiblematerial and renders unnecessary the employment, in connection with thebottle or the stopper, of elements formed of metal or other rigidmaterial.

To facilitate extracting the stopper from the bottle the rib 10 may beformed as a helix, the groove 12 in the stopper being similarlyhelically formed, so that on relative rotation between the stopper andthe neck in the appropriate direction, in consequence of theinter-engagement and for- 4 mation of these parts, the stopper will bedisplaced axially.

I laim:

1. A hot water container made of resilient material and having arestricted neck portion, a resilient stopper for closing the neckportion, said neck portion being formed with a re-entrant tubularelement provided with a shouldered opening into the container at itsbottom end and with an inwardly directed annular rib at its upper end,said stopper having an elongated cylindrical portion and a shoulderedbottom extension for closing the opening in the tubular element, andwith an annular groove at its upper end, for frictional engagement andco-operation with the annular rib of the tubular element.

2. The container of claim 1, in which the reentrant tubular extensionprovides an annular channel between its exterior surface and theinterior surface of the restricted neck portion, and wherein the stopperis provided with an enlarged head portion and with a shouldered flangeat the bottom of the head portion, for seating co-operation with theupper edge of the annular rib, and wherein the bottom extension of thestopper is tapered, to facilitate its entry into sealing engagement withthe opening in th re-entrant tubular element, whereby liquid pressurewithin the annular channel surrounding the r'e-entrant tubular elementwill accentuate the fluid-tight seal between itself and. the stopper.

' DAVID ATKIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STA'I'ES PATENTS Number Name Date 809,141 Schutze Jan. 2, 19061,292,690 Bowes Jan. 28, 1919 1,588,847 McGee June 15, 1926 FOREIGNPATENTS Number Country Date 731,031 France May 24, 1932 753,223 FranceAug. 7, 1933 611,569 Germany Mar. 30, 1935

